cannot import name 'CutType' from 'mip'

Soroush Safavi

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Aug 9, 2020, 6:22:32 PM8/9/20

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I was trying to run the "A pure cutting-planes approach for the Traveling Salesman Problem" example but I got a strange error: cannot import name 'CutType' from 'mip'.

please advise. Thanks

BR,

Soroush

Haroldo Gambini Santos

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Aug 10, 2020, 10:47:50 AM8/10/20

to Soroush Safavi, Python-MIP

Hi,

Just tried this example here and it worked fine. Could you provide more
details on your environment (python version, OS, python-mip version) ?

--
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Haroldo Gambini Santos
Department of Computer Science
Universidade Federal de Ouro Preto - UFOP
email: har...@ufop.edu.br
home/research page: www.decom.ufop.br/haroldo

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Soroush Safavi

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Aug 10, 2020, 2:18:17 PM8/10/20

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Hi,
My python is 3.7, Windows 10, I am not sure about my python-mip version but I assume it is the latest version. I also use Gurobi 9.0 (educational license) as solver.

On Monday, August 10, 2020 at 7:47:50 AM UTC-7, Haroldo Gambini Santos wrote:

Hi,

Just tried this example here and it worked fine. Could you provide more
details on your environment (python version, OS, python-mip version) ?

--
=============================================================
Haroldo Gambini Santos
Department of Computer Science
Universidade Federal de Ouro Preto - UFOP
email: har...@ufop.edu.br
home/research page: www.decom.ufop.br/haroldo

On Sun, 9 Aug 2020, Soroush Safavi wrote:

> I was trying to run the "A pure cutting-planes approach for the Traveling Salesman
> Problem" example but I got a strange error: cannot import name 'CutType' from
> 'mip'.please advise. Thanks
>
> BR,
> Soroush
>
> --
> You received this message because you are subscribed to the Google Groups
> "Python-MIP" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to

> pytho...@googlegroups.com.

Soroush Safavi

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Aug 11, 2020, 2:36:52 PM8/11/20

to Python-MIP

This is the error I am getting:

HAROLDO GAMBINI SANTOS

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Aug 11, 2020, 8:52:45 PM8/11/20

to Soroush Safavi, Python-MIP

One thing that may be the cause: Gurobi does not allow the access to their cut generators (at least to call them outside the b&b tree). Could you try to create your model entering = Model(solver_name='cbc') ?

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=============================================================
Haroldo Gambini Santos
Computing Department

Universidade Federal de Ouro Preto - UFOP
email: har...@ufop.edu.br
home/research page: www.decom.ufop.br/haroldo

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